package com.zfl;

public class NumSquares {

    public int numSquares(int n) {
        int[] dp = new int[n + 1];
        for (int i = 1; i < n + 1; i++) {
            dp[i] = i;
            for (int j = 1; j * j <= i; j++) {
                dp[i] = Math.min(dp[i],dp[i-j*j]+1);
            }
        }
        return dp[n];
    }


}
